Global warming was once an uncommon term used by a few scientists who were growing concerned over the effects of decades of pollution on long-term weather patterns. Today, the idea of global warming is well known, if not well understood. It is not unusual to hear someone complaining about a hot day or a freak storm and remark, “It’s global warming.” Although there has been a scientific consensus on global warming, some aren’t sure it’s something we need to worry about. There are some proposed changes in in a global context on policy related concerns in curbing global warming and the criticisms and concerns surrounding them.
Global warming could effect seasons, sea level and disrupt ecosystems.
Global warming is a significant increase in the Earth’s climatic temperature over a relatively short period of time as a result of the activities of humans. In specific terms, an increase of 1 or more degrees Celsius in a period of one hundred to two hundred years would be considered global warming. Over the course of a single century, an increase of even 0.4 degrees Celsius would be significant.
In the other hand, natural changes in climate can take the Earth thousands of years to warm up or cool down just 1 degree when it happens naturally. In addition to recurring ice-age cycles, the Earth’s climate can change due to volcanic activity, differences in plant life, changes in the amount of radiation from the sun, and natural changes in the chemistry of the atmosphere.
- Courtesy of global village
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